Make lint errors fatal in presubmit and fix files in whitelisted paths

webrtc/api/rtcerror.h

Index: webrtc/api/rtcerror.h
diff --git a/webrtc/api/rtcerror.h b/webrtc/api/rtcerror.h
index 2ba78371eb0034f17b19833be32dc9fddf6fdc59..5cb123227d4c2b4521b73e54361e0cace3fde31a 100644
--- a/webrtc/api/rtcerror.h
+++ b/webrtc/api/rtcerror.h
@@ -203,7 +203,7 @@ class RTCErrorOr {
   // is marked 'explicit' to try to catch cases like 'return {};', where people
   // think RTCErrorOr<std::vector<int>> will be initialized with an empty
   // vector, instead of a RTCErrorType::INTERNAL_ERROR error.
-  explicit RTCErrorOr() : error_(RTCErrorType::INTERNAL_ERROR) {}
+  RTCErrorOr() : error_(RTCErrorType::INTERNAL_ERROR) {}
 
   // Constructs a new RTCErrorOr with the given non-ok error. After calling
   // this constructor, calls to value() will DCHECK-fail.
@@ -213,7 +213,7 @@ class RTCErrorOr {
   // RTCError(...)' when the return type is RTCErrorOr<T>.
   //
   // REQUIRES: !error.ok(). This requirement is DCHECKed.
-  RTCErrorOr(RTCError&& error) : error_(std::move(error)) {
+  RTCErrorOr(RTCError&& error) : error_(std::move(error)) {  // NOLINT
     RTC_DCHECK(!error.ok());
   }
 
@@ -224,7 +224,7 @@ class RTCErrorOr {
   // NOTE: Not explicit - we want to use RTCErrorOr<T> as a return type
   // so it is convenient and sensible to be able to do 'return T()'
   // when the return type is RTCErrorOr<T>.
-  RTCErrorOr(T&& value) : value_(std::move(value)) {}
+  RTCErrorOr(T&& value) : value_(std::move(value)) {}  // NOLINT
 
   // Delete the copy constructor and assignment operator; there aren't any use
   // cases where you should need to copy an RTCErrorOr, as opposed to moving
@@ -248,7 +248,7 @@ class RTCErrorOr {
   // Conversion constructor and assignment operator; T must be copy or move
   // constructible from U.
   template <typename U>
-  RTCErrorOr(RTCErrorOr<U> other)
+  RTCErrorOr(RTCErrorOr<U> other)  // NOLINT
       : error_(std::move(other.error_)), value_(std::move(other.value_)) {}
   template <typename U>
   RTCErrorOr& operator=(RTCErrorOr<U> other) {